Neumayer Channel is 16 miles long in a NE-SW direction and about 1.5 miles wide, separating Anvers Island from Wiencke Island and Doumer Island, in the Palmer Archipelago. The south west entrance to this channel was seen by Dallmann, leader of the German expedition 1873-74, who named it Roosen Channel. The BelgAE, 1897-99, under Gerlache, sailed through the channel and named it for Georg von Neumayer. The second name has been approved because of more general usage.